Isaac mat



(No Model.)

I. MAY.

SWITCH AND SIGNAL LOOK.

Patented Dec. 6, 1887.

UNITED STATES PATENT OFFICE.

ISAAC MAY, OF BROOKLYN, NEW YORK.

SWLTCH AND SIGNAL LOCK.

SPECIFICATION forming part of Letters Patent No. 374,312, dated December6, 1887,

Application filed August 10,1887. Serial No. 246,553. No model.)

To all whom it may concern:

Beit known that I, ISAAC MAY, of Brooklyn, in the county of Kings andState of New York, have invented an Improvement in Switch and SignalLocks, of which the following is aspecification.

A reference is hereby made to Letters Patent No. 317,494, granted to meAugust 17, 1886, for a description of the general character and mode ofoperating switch and signal looks, as the present is a modification ofand improvement upon the said switch-lock.

In the drawings, Figure l is an elevation sidewlse of the levers. Fig. 2is an elevation edgewise of said levers, and Fig. 8 is a plan view withthe levers in section.

The levers A B are represented as pivoted at 2 upon the base of theframe 0, and they swing in slots between the segments D, the segmentsbeing fastened to the frame O. The pivoted handle 5 is upon each lever,and it is made to operate the holding device as heretofore usual, andthe rod 6 and drop-box '7 correspond to those in my aforesaid patent.

I make use of a locking-bar, 12, moving endwise across the lock-box 20,that is made hollow and contains the bolts 21, with V-shaped ends, thesame as in my aforesaid patent, and such lock-box may be at either sideof thelever.

At I, I have shown the lock-box in the same position as in mysaidpatent, and thelockingbars nearly horizontal, and at G thesame lock-boxis shown withthelocking-bars nearly vertical. Either or both forms maybe made use of, and the levers may be increased in nu mher to anydesired extent.

My present improvement relates to the com bination, with the levers andholding devices and the lock-bars,look-box,and bolts,of slotted leverspivoted upon the frame and connected with and moving thelock-bars, andthemselves being moved bythe handles 5 and links or rods 6, so that thelock-bars are moved but a short distance 5 but that movement is beforethe lever A or B can be moved, and thereby the length I and extent ofmotion of the lock-bar, as in my aforesaid patent, are avoided. The bentand slotted levers H I are pivoted at 25 between the frames 0, and therespective lock-bars are con neeted at their ends by the hinges orpivotbolts 26, and the levers H I are slotted longitudinally at 30, and32 33 are the pins at the lower ends of the rods 6, that enter the slotsin such levers H I and move said levers when the handles 5 are actuatedin grasping the lever Aor B to move the same. It will now be understoodthat the lever A is represented in the normal position, and that thelever B is shown as having been moved, and in sodoing the lock-barstherewith connected have first been given a motion by the handle 5, rod6, and lever I, and locked the bars that are connected with the lever H,so that the handle 5 of the lever A cannot be moved; neither can thelever A be moved until the lever B is brought back to its normalposition, so that thelo'cks with V-shaped endscan be moved in eitherdirection to lock the switch orsignal handle automatically that remainsin a fixed or normal position.

By the use of a range of locks within the lock-box, as seen in theaforesaid patent, the present improvement is rendered available withthree or more switch or signal levers to effectually prevent aseoondlevel-being moved until the first lever is restored to its normalposition.

I claim as my invention- The combination,with the frame, the switch orsignal levers, and the notched locking-bars, lock-box, and locks, of thebent levers pivoted at 25 to the frame and slotted longitudinally, andconnected at their ends to the respective locking-bars, and thehandles5, rods 6, and pins entering the slots of the lovers, substantially asset forth.

Signed by me this 6th day of August, A. D.

ISAAC MAY. WVitnesses:

VVILLIAM G. Mora, HAROLD SERRELL.

